Active, Ultra-Wideband, Electrically Small Antennas for High-Power Transmission in the HF Band

Antennas operating at the high-frequency (HF) band (3–30 MHz) are often electrically small due to the large wavelength of electromagnetic waves (10–100 m). Passive electrically small antennas (ESAs) have low bandwidth and poor efficiency values, which makes them challenging to radiate instantaneously broadband, high-power signals for applications such as electronic warfare. To address these challe...